Buttonhole-sewing machine



Fo sopf, 16, 1924.

STATES L508,660 P TENT oFFICE,

Be it known tht I, BRND T. LBvBQUE, o oiizen of the United States, Tesi(1i11 of vehaIn, i]1 the county of ESSex and tote of SSaoh11S8tfs, hvo iovented oertgin neW nd osofu1 IInpTovoInents in Buttonho1e SeWi MaohineS; and I do hereby dec11'e the fo oWing to be 8 fu11, cleor, ond exoct (1escri tion of the i1venfion, Such as' Will enab1e othefs s1(i]led iI1 the ort to Which it a eTtoins to moko ond uso tho somo.

Tho invenfion ToloteS to seWing maohineS n Inofe ftioo1of1y to In ohines for SeW ing bnftonholes in which the Work is fed au l the seWing to Space the StitcheS along t1le I e of the bnttonhole.

In 1nchineS of this t e the work iS usu- 811 oie by o WoTk olam Within Which it ls oooTately poSifione(1 TeviouS to each bnttonhole seWin o eTation and b vhidh i1= shon1(i bo hold onti1 tho ooIn letlon of o bnttoho1o, tho seWing of which has onoe beo sfaTtod. If, however, the thfead should bTeok doIing fhe SeWing, the reoiprocation of B ooodle of needles and the fee(1 of the WoTk m y oontinne unti1 the bnttonhole W c c]e is com leted and the WOTk re- 1eso honld this ooour the WoTk n111St be opositione(1 in fhe olam With extreme cafe i ofdel that the o eTations on the Wofk moy bo fepeated ot the exBof ointS opeToted on in the pfovioos oycle i11 W ich the bTeok ooouo, The 0 efotoT thefefore endeovoTS to so the maone on the bteaking of the fhTea befote the oyo e iS coIn leted. To !e 1ieve the operot01' of thiS duty and to iI1 sofo fhe in1Inodioto interruption of the but tonflole Inaking oyole opon tho bfeoking of the thead the feSent invention co11teIn- 18teS the pTovision of IneanS Which operotes fo Stop tho foed of the Wofk upon the break ig of t11e t11fead. The progressive oper tio of the neodleS alo11 tho work iS thuS aT!ote So that they Wi opefoto idly until the machine iS Sto ed by the o erotoT. The needle of needleS may then be re-thTeaded n the SeWi be TesuIIled at t1le point WheTe the bfeo oooured, thuS oom leting tho inteTfupfed cyc1e ond f11iSh fhe nttonhole thot 11a(1 been Starfed pTeviouS fo the brea 0 the thTead.

pTefe fed foT1n of 11e invent ion is ShoW i1 the occomayig drowing a lied to fho button ole SeWing maohine S11oWn oiII(1 desoribed in ppcation 1`To.

255,8 9, file(1 Se t. 26, 1918. In the dtovvings ig. 1 iS Side elev8tion shoWing the above machine With-the prefeTTed form of the invention a lied t11eTeto, 8nd Fig. 2 iS o vertical Seotional vieW on lino 2, ig. 1.

Tho n1achine shown i11 tlle droWings is pfovided With a Stitch-forn1ing meohnism con1Prisi11 on nppeT needle 2 ond on under needle 8n 1oopeT (not ShoWn) Which oooP- erate 111 forIning 8 Wen knoWn type of over- Seom buttonhole Stitch. Tho bnttonhole is out progfessively dnring the SeWing by B SIno11 outtef oofried by 8 voftioany feciproooting cntter bar The Work is oorried by o work olomp i 1diooted enerony at 6 and thel Work iS outomatico y Spoood bo tWeen buttonhole Inoking oyoles by o spaoing gri pef indicoted of 8. The Wofk domp is moved lengthWiSe of tho buttonholo to feed the Work by 8 feed oam Seoufed to o oan1 Shoft Which olSo caTries caIns foI controning nd opeToting various IneohonisInS of the lnoohine.

he o111 Shoft iS driven. of 8 high spoed at the begionin of each cycle to effect the c10Sing of the c am ond other preHminory o1)efti0nS, iS given 8 ste b Step novenlent during the seWing to ee the Work and S ace the stitcheS and iS ogoin dfiven ot a h1gh speed at the completion of fhe seWing to Teturn the Work c1m to its initi1 os1 tio11 to o erafe a cuttef for ontting the upper needle thTead, to o ,en the clamp and to o xeTto the Work S aclng gri er. The meo anisnn for thuS operatlng the caIn sh8ft coInpfiseS a wofn1 Wheel 12 and o Worm 1 Whioh engageS tho Wofn1 Whee1 ond iS odapted to be Tototed eitheI' continuonsly 8t al high S eed of interDittent1 fron1 an actnator Shaft 16. The Worm ls seonred to o Sleeve 18 Whioh is Inounted to tufn on the shoft 16 nd is provided of itS end With o c111tch IneII1be1 20. The Inec11a11iSII1 for drivin the Worm at 8 hi hs eed com riSeS .Sleeve II101111te(i to tufn on the s oft 16 an(1 rovided of its innef end With o olotoh lnen1 of franged to bo engaged With ond diseng ged ffoIn the inner zone of the olofoh momber 20 b length iSe Inovement of the Sleeve 22 on te Shoft. he onter end of fhe Sleeve carfies an ootooting u11e 24: Which is oontinnooSly dTiven. T e S eove 22 iS moved to throW tho high speed drive into ond oot of action by o leve1' 26, Whioh is op' eroted by 9. oam 011 the com haft. 

